Problem: default LINGER value is insane

Solution: use a sane value, e.g. 2 seconds

Fixes #1247
Merge pull request #1250 from c-rack/master

No error-checking of setsockopt ZMQ_CURVE_* z85 keys. Solves #1094.
Merge pull request #1248 from hintjens/master

Problem: default LINGER value is insane
Use consistant spelling in documentation

behavior -> behaviour
initialize -> initialse
initialization -> initialisation
Fix typos.
Merge remote-tracking branch 'upstream/master'
Merge pull request #1251 from johntconklin/master

Use consistent spelling, fix typos.